Gustave cook



(No Model.)

G. COOK.

NUT LOOK.

No. 381,468. PatentedApr.' 17, 1888.

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IJV'VENTOR To all whom it may concern:

UNITED STATES l PATENT OFFICE,

GUSTAVE COOK, OF NEW ORLEANS, LOUISIANA, ASSIGNOR OF ONE-THIRD TO BILDERMAY & CO., OF SAME PLACE.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 381,463, dated April17, 1888.

Application tiled August 29, 1887. Serial No. 248,234. (No model.)

Be it known that I, GUsrAvE CooK, a citizen of the United States,residing at New Orleans, in the parish of Orleans and State ofLouisiana, have invented certain new and useful Improvements in anAutomatic Lock-Bolt; and I do declare the following to be a full, clear,wid exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to improvements in an automatic lock-bolt, in whicha nut is made to operate in conjunction with agrooved bolt; and theobjects of my improvements are to provide a bolt for fish-bars oi'railroad-tracks and bridges that will keep the nut on bolt in a positiveposition. I attain these objects by the mechanism illustrated in theaccompanying drawings, in which- Figurel is a side view of my improvedbolt, showing a nut in the groove thereof. Fig. 2 is a similar view ofthe bolt with the nut removed, and Fig. 3 is a view of the nut.

Similarletters refer to similar parts throughout the several views.

In constructing my device I take the ordinary bolt-such as is in use forrailroads or bridges- With the head A, shoulders B, and shank C, andthreads F. On C atD I place a groove, so constructed that a nut will fitwithin same., This groove may be au eighth of an inch or more in depth,with square shoulders on each side, so that pressure on nut is uniform.In adjusting my bolt the same is placed through opening in fish-bar andopening in 35 railway-bar, and nut is placed on thread of bolt in theusual manner and turned until itis forced within groove D, where it iskept in a secure position under all circumstances.

I do not confine myself` to use of bolt for tish- 4o bar plates onrailway-tracks, but my device is especially adapted forbridgeboltskeeping nut in a positive position. I am aware that nutlockshave heretofore been in use Where two nuts were placed on threads ofbolt and made 45 self-acting. Ido not claim such an invention; but

lVhat I do claim, and desire to secure by Letters Patent of the UnitedStates, is-

The headed bolt having the shoulder B, the 5o reduced plain shank C,groove D, and the threaded portion F, in combination with a uut,substantially as specified.

In testimony whereof I afix my signature in presence of two witnesses.

GUsrAvE cooK.

Vitnesses:

HENRY J. RHODES, PERCY D. PARKS.

